Telephone receiver



-the accom )anvinv' drawing and claimed. .y t* 2 SIGMUND HONIG, 0F NEW YORK, N. Y.

TELEPHONE RECEIVER.

lApplication led July 19,

To all u-/zom if may concern Be it known that l, thorium) Home, a citizen ot' the United States, and resident of New York city. Vin the county of Bronx and btate of New York, have invented certain new and usei'ul Improvements in Telephone Receivers, ot which the following is a speciication.

This invention relates to certain new and useful improvements in loud talking telephone 'receivers of that type embodying a plurality of diaphragms with multiple connections t'or conveying sound Waves to 'a single or common ear piece.

The primary object or" this invent-ion is to provide an improved telephone receiver of the above type which is extremely simple and compact in structure as well as durable and efficient in Operation.

A further object ot the invention is to provide a telephone receiverof the above kindI embodying a plurality of horse shoe magnets with improved means for encasing and supporting the same.

Another object of the invention is to provide a telephone receiver of the above character embodying horse shoe magnets and pole extensions therefor having vibratable diaphragms at the opposite ends thereof and sound wave conducting 4means ior transmitting the same. from both sides of both oi the diaphragms to a common ear piece. n

A still further object of the invention is to provide a. receiver as set forth in the last above mentioned object wherein the distance of travel of the sound waves in all directions from the diaphragme to a point near or in the ear piece will be equal so that said waves will meet or reach said point at the same moment for insuring practicability ot' the receiver.

Further objects will become apparent as the nature of the invention is better under-v stood, and the same consists in the novel form, combination and arrangement ot parts hereinafter more fully described. shown in In the drawingwherein like. reference characters indicate corresponding parts throughout the several views,

Figure l is an end elevational view of a receiverv constructed in accordance with the present invention.

Figure 2 is a substantially central longispecication of Letters Patent.

rammen May 23,1922.

1920. Serial No. 397,437.

tudinal sectional view of the casing with the remaining parts shown in elevation,

Figure is a transverse sectional view ot the device shown in Figs. l and 2 with parts omitted,

Figure 4 is a top plan view of the device shown in Fig. 3 with the casing omitted,

Figure 5 is aperspeetive view ot' one of the pole extensions,

Figure 6 is a perspective view of the magnets and pole extensions operatively related,

Figure 7 is a perspective view of the tube enclosed by the pole extensions and the tube and ear piece connected thereto, and

Figure 8 is a somewhat diagrammatic view illustrating the means lfor conducting the sound waves from opposite sides of the diaphragms to a common point adjacent the ear piece.

Referring` more in detail to they Iseveral views, the present invention embodies a casing including a 'central ring 5 internally screw threaded' at'its ends, the threads at one end being le't't hand threads and those at the other being right hand threads. A pair ot' 'end rings (3 are externally threaded and screwed into the ring` 5 whereby when the rings 6 are held stationary, and the ring 5 is rotated, the rings (3 will be drawn toward each other or separated according to the direction ot rotation of the ring A cap 7 is threaded upon the outer end ot eac-h ring (S so as to substantially close the ends of the bod)v formed b v the rings 5 and (i.

'lhree horse shoe magnets S are arranged within the casing and fastened together b v screws 9 extending through lthe poles oi the magnets. and a pair ot' pole extensions l() are fastened to the magnets by these screws 9. said screws extending through openingsl or apertures 1l provided in the wings 12 which are rigid with the pole extensions 1l). pole extensions are preferably of soft iron and semi-circular in shape as clearly shown in Figs. 3. 5 and 6. and the wings 1:2 are inserted between the end magnets andthe l center magnet so that the center or middle magnet is between each pair of wings 12. while the pole extensions l() are located in the center ot the space bounded by the magnets. The extensions- 1() do not touch each other. and within the same is inserted a tube The i extensions 10 and being open at both ends. A tube 14 extends through an opening 15 provided in the ring 5 and communicates with the interior of the tube 13 substantially centrally thereof as best seen in' Figs. 7 and 8, a suitable ear piece 16 being provided upon the outer end of the tube 14 exteriorly of the casing. As the tube 13 tits snugly between the pole extensions 10, the same is effectively supported in position when the magnets are arranged within the casing aswill presently become apparent. I

Around each end of the pole extensions outwardly of the magnets, is wound a number of turns of silk covered wire 17 of the same quality and gage as that used in ordi* nary telephone receivers now in extensive use, and this wire is extended in any suitable manner through the casing and connected t0 the terminals or binding posts l18' which are carried by the ring 5 opposite the opening 15 and exteriorly of the casing, which terminals are adapted for connection with the vtelephone wires 19 in thevusual manuel'.

.At each end of the pole extensions and the wire windings 17 is fastened or soldered `a disk 20, the pole `extensions extending through central openings' provided in the disks 2O as seen in Fig. 2, and these disks are substantially the same as those on the bobbin of an ordinary receiver, but are of such, size that they ll the entire width of the case and thusform a chamber between the same and the adjacent diaphragm 21. Each diaphragm 21 is held in position by one'of the end caps 7.

The magnets, pole extensions, and associated parts are placed inside of the rings 5 and 6 and fastened by means ofl a screw 22 which is threaded through the ring 5 opposite .the opening 15 and which is also threaded into a screw threaded' opening 23 provided centrally in the clamp 24 which embraces the central portions of the magnets 8, said clamp 24 having screws 25 for engagement with the magnets so as to rigidly maintain the latter intheir roper relation. The tube 14 is then inserted tlirough thejhole 15 and connected with the tube 18. `The ends of the wire windings 17 are yconnectedI with the posts or terminals 18 and the diaphragms21 are placed in position, after` which the vcovers or caps 7 are screwed on. A pair of curved nipples 26 are secured centrally of the covers7 so that 'the same interiorly communicate with the casing, and these nipples are-connected by means of flexible tubes 27A with the branch nipples 28 provided on the tube 111 adjacent the ear piece 16. When the wires 19 are attached to the posts 18, the device is ready for use.

In operation, the electric current from the telephone wires 19 passes through the wiring 17 Qn the polar extensions and alternately strengthens and weakens the magnet for causing vibration of the diaphragms 21.

These Vibrationsproduce sound waves when the diaphragms .vlbrate back and forth, and

the vibration forwardproduces sound'wavesA indicated by the arrows a in Fig. 8'wl1ich pass through the tubes 27 and tube 14 to the ear piece 16. By the backward vibrations7 sound waves are produced vas indicated by arrows b in Fig. 8 whichA pass through tube 13 and tube 14 to the. ear piece 1,6. The routes of travel ofthe forward sound Waves from the diaphragms to the point 0 of Fig. 8

are equal in distance to the routes of travel of the backward sound waves to the point c so that both waves will reach the pomt c at the same moment. The soundwaves at c, therefore7 will be the sum of the waves of substantially four receivers so that aneig` tremely loud talking telephonev receiver' is the result.

It is believed present invention will be readily understood and appreciated by those skilled in the art.`

Minor changes may be made therein without departing from the spirit and scope oi' theinvention. as claimed.

What is claimed as new is 1. In a loud talking telephone receiver,- a

that the? construction and" operation as well as the advantages of the pair of diaphragms, means for vibrating the same including horse shoe magnetsand `pole extensions therefor, each end of said exten- .sions being associated with one of said diaphragms, an ear piece, and sound comiucting means connected to said ear piece and' communicating with opposite sides of both of said diaphragme. y

2. A telephone receiver like that set forth in claim -1 wherein' the sound conducting. means provides acommon meeting point for.

the sound waves the same distance from the first named tube and extending exteriorly of the casing, an ear piece upon the Youter end of said last named tube, and sound conducting means at the opposite ends of said casing communicating with said second named tube adjacent said ear piece.

4. In a telephone' receiver, a plurality of horse shoe magnets, pole extensions secured thereto including wings spacing said'magnets, a casin clamp upon t e central portion of said mag surrounding said magnets,'a

nets, and a screw extending through said casingf and engaging said clamp tor rigidly supporting the magnets in their operative position Within the casing. p l

5. In a telephone receiver, a plurality of horse shoe magnets, pole extensions secured thereto including wings spacing said magnets, a casing surrounding said magnets, a clamp upon the central portion of said magnets, a screw extending through said casing and engaging said clamp for rigidly supporting the magnets in their operative position within the casing, windings upon said pole extensions, a tube within said extensions open at its ends, diaphragme secured Within the ends of the casing adjacent the ends of said pole extensions, an ear piece carrying tube communicating centrally with the lirst named tube and extending exteriorly of the casing, and means at the outer sides of said 'diaphragms for conducting sound waves to the ear piece carrying tube exteriorly of the casing.

6. A loud talking telephone receiver including a casing having diaphragms secured in the opposite ends thereof, means for attracting said diaphragms inwardly of the casing including a plurality of pole extensions having their ends opposed to said diaphragms, a tube within said pole extensions, a sound conducting tube connected with the rst named tube and extending exteriorly of the casing, an ear piece upon the outer end of said last named tube, and sound conducting means at the opposite ends of said casing communicating with said second named tube adjacent said ear piece.

7. In a telephone receiver, a plurality of horse shoe magnets, pole extensions secured thereto, said pole extensions including opposed substantially semi-circular pole extension members disposed axially of and having their ends projecting beyond the opposite sides of said magnets, and windings upon the projecting ends ot said pole extension members.

8. In a telephone receiver, a plurality ot' horse shoe magnets, pole extensions secured thereto, said pole extensions including opposed substantially semi-circular pole extension members disposed axially ot' and having their ends projecting beyond the opposite sides of said magnets, windings upon ,the projecting ends of said pole extension members, and Wings projecting laterally from said pole extension members and spacing said magnets.

9. In a telephone receiver, a plurality lof -horse shgie magnets, pole extensions secured thereto, said pole extensions including opposed sutlstantially semi-circular pole cxtension members disposed axially ot and having their ends projecting beyond the opposite sides ot' said magnets, windings upon the projecting ends of said pole extension members, and wings projecting laterally from said pole extension members and spacing said magnets, said wings being fixedly secured to the magnets for supporting the pole extension members spaced from and substantially centrally Within the magnets. 10. In a telephone receiver, a plurality of horse shoe magnets, pole extensions secured thereto, said pole extensions including op posed substantially semi-circular pole extension members disposed axially of and projecting beyond the opposite sides of said magnets, wings projecting laterally from said pole extension,members and spacing said magnets, said wings being fixedly secured to the magnets for supporting the pole extension members within the magnets, a sound conducting tube held between the pole extension members, and windings upon the opposite ends of the pole extension members at the opposite sides of said magnets.

ll. In 'a telephone receiver, a plurality of horse shoe magnets, pole extensions secured thereto including wings spacing said magnets, a casing surrounding said magnets, windings upon said pole extensions, a tube within said extension open at its ends, diaphragms secured Within the ends of the casing adjacent the ends of said pole extension, and an ear piece carrying tube communicating centrally with the first named tube and extending exteriorly of the casing.

12. In a ltelephone receiver, a plurality of horse shoe magnets, pole extensions secured thereto including wings spacing said magnets, a casing surrounding said magnets, windings upon said poleA extensions, a t'ube within said extension open at its ends, dia- `phragms secured within the ends of the casing adjacent the ends of said pole extension, an ear piece carrying tube communieating centrally with the first named tube and extending exteriorly of the casing, and means at the outer sides of said diaphragms for conducting sound Waves to the ear piece carrying tube exteriorly of Ithe casing.

13. A telephone receiver like that set forth in claim l2 wherein the sound conducting means provides a common meeting p int for the sound Waves adjacent the ear pi vce and the same distance from the opposite ides of both diaphragms. i

14. In a loud talking telephone receiver,-

a pair of diaphragms, means for Vibrating said diaphragms, l and sound-conducting means' communicating with opposite, sides Aof both of said diaphragms and providing a common meeting point for the sound waves the same distance from the opposite sides of both di aphragms.

l5. A loud talking telephone receiver including casing having daphragms secured in the opposite ends theres?, means for attracting said diaphragms inwardly of the caslng including a. plurality of pole extensions havingtheir ends opposed to said diaphragms, a tube held between said pole eX- tensions, and a4 sottnd-conducting tube con` nected with the first named tube and extending exteriorly of the casing.

16. in a loud talking telephone receiver, a casing including a central ringv and end rings adjustably connected for lengtheningy or shortening said casing, diaphragnis at the outer'ends of said end rings, caps securing said diaphragnis against the outer ends oi said end rings, and means within the cascared Within the ends of the easing in spaced relation to the ends of said pole extensions, disks secured upon the ends of said pole eX- tensions in spaced relation to the diaphragnis and contacting the inner surface of the cas` ing' so as to provide a chamber between each of said disks and each of the diaphragms, the open ends of the tube each projeotingvinto one of said chambers, and a sound-conduct ing tube communicating centrally with the first named tube and extending exteriorbv of the casing.

I8. In a loud talking'telephone receiver, a pair of diaphragnis, means for vibrating said diaphraguis, a single ear piece, and 'tubular means connected with said ear piece and cornniunicating with opposite sides of both of said diaphragrns to provide a common meetiner point for the sound waves at said ear piece. Signed at the city of New York, in the county of New York, and State of New York, this 17th day of July, A, l). 1920 SlGllUND HONIG. 

